Microsoft is investigating a known issue that causes the mouse pointer to disappear in the classic Outlook desktop email client for some users.

This bug has been acknowledged almost two months after the first reports started surfacing online, with users saying that Outlook became unusable after the mouse pointer vanished while using the app.

“My mouse just stopped being visible while I am using Outlook, and this is very, very, frustrating because my permission wasn’t given to make these changes, and now I can’t find anything, can’t open emails, can’t copy and paste, and the list goes on and on,” one customer noted.